Type I — Small Appliances第 104 / 240 题
Which of these is a defining physical feature of a small appliance that distinguishes it from field-installed equipment?
a.It contains between 5 and 50 pounds of refrigerant
b.It must be charged by the installer on site
c.Its refrigerant circuit is hermetically sealed and charged at the factory
d.It always uses a thermostatic expansion valve
解析
A small appliance is hermetically sealed and charged at the factory, unlike field-assembled split systems that are charged during installation. This factory-sealed construction, combined with a charge of five pounds or less, is what places it in the small-appliance category. Metering device type and larger charge sizes are not part of the definition.
法律依据: 40 CFR §82.152免费刷完整 240 道题库 — 无需注册。
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